正则表达式部分隐藏电子邮件? [英] regexp to partly hide email?
问题描述
我想要实现的目标很简单，我想要诸如
It's rather simple what I'm trying to achieve, I want input such as
漢aelena@tratata.com
成为:
漢******@tratata.com
所以我制作了这个正则表达式来匹配第一个字符和@".
So I made this regexp to match between the first char and the '@'.
mb_regex_encoding ('UTF-8' );
mb_ereg_replace('(?<=^.{1}).*?(?=@)','*','漢aelena@tratata.com',1);
问题是，它只会匹配一次，因此只会在那里放一颗星，而不是六颗.像这样的东西，就是我会得到的:
The problem though, it would only match it one time, and thus would only put in there one star, instead of six. Something like this, is what I would get:
漢*@tratata.com
然后我想使用mb_ereg_replace_callback，返回:
Then I wanted to use mb_ereg_replace_callback, to return:
return $matches[1].str_repeat('*', strlen($matches[1]));
然后我阅读了规范，它说 mb_ereg_replace_callback 在 PHP 5.4.1 或更高版本中可用.
Then I read specs and it said mb_ereg_replace_callback is available in PHP 5.4.1 or later.
...有什么想法可以实现同样的目标吗?
...Any ideas how could I achieve the same thing?
推荐答案
不需要使用回调函数，一个正则表达式即可.
There is no need to use a callback function, a single regular expression can do it.
(?<=.).(?=.*@)
(?<=.)，请确保前面至少有一个字符，以免替换第一个字符..，匹配任意字符.(?=.*@)，确保字符后面有一个@.(?<=.), make sure there is at least one character before so it won't replace the first character.., match any character.(?=.*@), make sure there is a@somewhere after the character.
将函数更改为带有 unicode 修饰符的 preg_replace 示例(如建议):
Example with function changed to preg_replace with unicode modifier (as suggested):
echo preg_replace('/(?<=.).(?=.*@)/u','*','漢aelena@tratata.com');
输出:
漢******@tratata.com
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